video doesnot play when we rotate Relativelayout containing Exoplayer

[pawaom]

I am simply trying to rotate the relative layout which contains the exoplayer , but when the relative layout is rotated the video doesnot play.

I have put up the code I am trying and the detailed question
at
https://stackoverflow.com/questions/47028127/video-doesnot-play-when-we-rotate-relativelayout-containing-exoplayer

how can we just rotate the relative layout and still play the video